Incidence and Heat Resistance of Clostridium botulinum Type E Spores in Menhaden Surimi

摘要

ABSTRACTRaw menhaden surimi (Brevoortia tyrannus) was examined to determine the incidence ofClostridium botulinumspores. Seven of 565 test portions (1.2) were positive for type E spores. The thermal death time (TDT) tube method was used to determine the heat resistance ofC. botulinumtype E spores inoculated into the remaining 558 negative portions. Calculated mean D‐values in mm were 8.66 at 73.9°C, 3.49 at 76.7°C, 2.15 at 79.4°C, and 1.22 at 82.2°C. The z‐value of the phantom TDT curve was 9.78Co. Our data indicate previously reported minimal time/temperature thermal processes used to set surimi gel provide an adequate margin of safety with regard toC. botulinu